Appearing in the anime FLCL OVA on the front of Haru Haruko's (caricature) yellow vespa, a white letter "P" and exclamation point encircled in black is widely accepted as a logo representing the Japanese rock group "The Pillows."

Was it created by the animators as spontaneous endorsement? Is it an infamously old band logo resurfaced? Originally some confused representation of Piaggio-Vespa? probably the most former, everyone seems to be going with it.

While not popularly recognized in it's own country, "P!" seems to have a runaway success story in the United States due to the promotion of American anime and J-rock fans alike- the result being that FLCL, The Pillows and the "P!" logo seem to carry a synonyms relationship.